<!DOCTYPE html>
<html>
    <head>
        <script src="vue.js"></script>
    </head>
    <body>
        <div id="app">
            <parent></parent>
        </div>
        <template id="child">
            <div>
                <button @click="click">Send</button>
                <input type="text" v-model="message">
            </div>
        </template>
        <script>
            Vue.component('parent',{
                template: '<div><child @childFn="transContent"></child>' + '子组件传来的值：{{message}}</div>',
                data(){
                    return{
                        message:''
                    }
                },
                methods:{
                    transContent (payload) {
                        this.message = payload
                    }
                }
            })
            Vue.component('child', {
                template:'#child',
                data() {
                    return {
                        message:'子组件的消息'
                    }
                },
                methods:{
                    click(){
                        this.$emit('childFn',this.message);
                    }
                }
            })
            var vm = new Vue({
                el:'#app',
                data:{
                    flag:true
                }
            })
        </script>
    </body>
</html>